44 MISSOURI BOTANICAL GARDEN. 
connate to the apex, and spathe-like; filaments dilated, bottle-shaped, 
not pubescent; anthers suborbicular. 
S. susutata (Linn.) Buchenau, Abh. Nat. Ver Bremen, 
2: 490 (1871). Alisma subulata L. Sp. Pl. 343 
(1753). WS. pusilla Nutt. Gen. 2: 213 (1818). 
S. natans var. lorata A. Gray, Man. Ed. 5, 494 (1867), 
not Chapm. 
Monoecious, with 1 or 2 flowers of the lowest verticil 
fertile, or all staminate; low, 5 to 15 cm. high, usually 
with rigid, obtuse or acutish phyllodia, or rarely with 
linear-lanceolate, subacute blades 2 to 3 cm. long, narrow- 
ing at the base into a spongy petiole; scape simple, equaled 
or exceeded by the leaves, few flowered; flowers rather 
large for the size of the plant, 15 mm. across; sepals ovate- 
lanceolate, obtuse; fertile pedicels 10 to 15 mm. long; 
bracts acute; stamens 7 or 8, less than 2 mm. long, the 
filaments equaling the anthers; acheniarather few, nearly 2 
mm. long, 3-crested, with a short and slender, abrupt 
lateral beak and a short, fusiform resin passage down the 
middle of each face; fruiting head small.— In mud, tide- 
water flats from New York to Florida and Alabama. — 
Plate 13. 
Specimens examined from New York (Sartwell; Torrey; A. Gray, 
Albany); Pennsylvania, New Jersey and Delaware, shores of the.Dela- 
ware (Martindale; Conrad; Zanzinger, 1844; Durand, 1848; Tatnall, 
1860; Austin, Hackensack; Smith, 1867); Maryland (Canby, Saulisbury, 
1863; Porter, Port Dupont); District of Columbia (S. Watson, 1871; 
Seaman, 1872); Virginia (Dr. Robbins, shores of the Potomac; L. F. 
Ward, Custis Spring, 1877 and 1878); North Carolina (M. A. Curtis, 
1843); Georgia (Baldwin); Florida (J. D. Smith, 1884, Magnolia, Clay 
Co.), Alabama (Charles Mohr, shores of Mobile Bay). Flowering from 
July to September. 
S. suBULATA NATANS (Michx.).— S. natans Michx. FI. 
Bor. Am. 2: 190 (1803). WS. natans var. lorata 
Chapm., Flora S. U. S., 449 (1860). 
Larger, submerged plant with ovate-oblong, elliptical, or 
subcordate, or truncate-hastate, floating leaves, with broader 
and longer flattened phyllodia; scape and pedicels elongated, 
18 
